Accessory locking device for a doorknob having a keyhole...

Details Accessory locking device for a doorknob having a keyhole... Accessory locking device for a doorknob having a keyhole...

E - Fixed Constructions

05

B

70/11

E05B 13/00 (2006.01)

Patent

CA 1272611

ACCESSORY LOCKING DEVICE FOR A DOORKNOB HAVING A KEYHOLE THEREIN Abstract of the Disclosure The accessory locking device includes hingedly connected shells having confrontable flanges that have convexly curved outer surface portions, each flange having a notch therein. A keeper tube has a slot so that the keeper tube is longitudinally slidable over the convexly curved portions of said flanges. Secured to the keeper tube is an auxiliary cylindrical lock having a projectable and retractable bolt, said bolt being projectable through a hole in the keeper tube so as to provide obstructive interference with the notches in said flanges. In this way, the keeper tube cannot be slidably withdrawn from the flanges until the bolt is fully retracted from the notches.

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